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Standard Test Method for Determination of Trace Thiophene in Refined Benzene by Gas Chromatography and Sulfur Selective Detection (Includes all amendments And changes 7/7/2015).
Automaticky preložený názov:
Štandardná skúšobná metóda pre stanovenie stopových thiofenového rafinovanom Benzén plynovou chromatografiou a síry Selektívny detekcia
NORMA vydaná dňa 1.6.2010
Označenie normy: ASTM D7011-10a
Poznámka: NEPLATNÁ
Dátum vydania normy: 1.6.2010
Kód tovaru: NS-37287
Počet strán: 7
Približná hmotnosť: 21 g (0.05 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Keywords:
atomic emission detector, benzene, chemiluminescence detector, gas chromatography, pulsed flame photometric detector, sulfur, thiophene, Gas chromatography (GC), Refined benzene, Sulfur selective detection, Thiophene content, ICS Number Code 75.160.20 (Liquid fuels)
Significance and Use | ||||||||||||||||||||||
Accurate gas chromatographic determination of trace levels of thiophene in benzene involves special analytical problems because of the difficulties of trace level analysis. These problems arise from the low concentration levels that need to be measured, the type of column and detector needed for analysis, and the potential interference from the benzene matrix. This test method was found applicable for determining thiophene in refined benzene conforming to the specifications described in Specifications D2359, D4734, and D5871 and may be applicable toward other grades of benzene if the user has taken the necessary precautions as described in the text. This test method was developed as an alternative technique to Test Methods D1685 and D4735. |
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1. Scope | ||||||||||||||||||||||
1.1 This test method covers the determination of thiophene in refined benzene using gas chromatography and sulfur selective detection. The test method is applicable to the determination of thiophene at levels of 0.02 to 2.18 mg thiophene per kg in benzene (mg/kg) on the AED, 0.03 to 1.87 mg/kg on the PFPD, and 0.03 to 2.11 mg/kg on the SCD. The range of the test method may be extended by modifying the sample injection volume, split ratios, calibration range, or sample dilution with thiophene-free solvent. 1.2 In determining the conformance of the test results using this method to applicable specifications, results shall be rounded off in accordance with the rounding-off method of Practice E29. 1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see Section 7. |
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2. Referenced Documents | ||||||||||||||||||||||
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